Method and apparatus for activating a virtual machine in a virtual solution

ABSTRACT

Embodiments of the present invention relate to a method for activating virtual machines in a virtual solution, including: for each virtual machine, activating activation items in a first activation item set independently of other virtual machines; and for at least one virtual machine, activating activation items in a second activation item set in coordination with activation of activation items of at least another virtual machine. There is further provided an apparatus for activating virtual machines in a virtual solution, including: a first activator for activating, for each virtual machine, activation items in a first activation item set independently of other virtual machines; and a second activator for activating, for at least one virtual machine, activation items in a second activation item set in coordination with activation of activation items of at least another virtual machine.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority under 35 U.S.C. §119 from ChinesePatent Application No. 201010163301.8, filed Apr. 29, 2010, the entirecontents of which are incorporated herein by reference.

FIELD OF THE INVENTION

Embodiments of the present invention relate to data processing, and moreparticularly to a method and an apparatus for activating activationitems on at least one virtual machine in a virtual solution, and arelevant computer program product.

BACKGROUND OF THE INVENTION

Evolution of computer technology increases user demands on computersoftware. Moreover, a user usually has to separately install a pluralityof desired software products to a target hardware device so as tocompletely implement a required system configuration. Such situation canalso exist that a plurality of software products to be installed has amutual dependency relationship there between. For example, softwareproduct 1 is dependent on software product 2 (namely, software product 1can only be correctly installed after software product 2 is correctlyinstalled), while software product 2 is further dependent on softwareproduct 3, and so forth. At this point, the installation sequence ofsoftware products has to be determined empirically by a technicalengineer, for example, first installing software product 3, theninstalling software product 2, and finally installing software product1.

It is a quite time-consuming and complicated work to implementfunctional configuration by such manual installation of software,because the technical engineer must first determine an installationsequence of respective software products, and additionally, afterrespective installations are installed, it is also required to configurethe software according to corresponding installation configurationparameters of the software. In other words, for such operation of manualinstallation of software, the technical engineer must have richexperience for correctly configuring each installed software product.Additionally, a great amount of repetitive manual operation is requiredfor performing installation to multiple devices. Therefore, the priorart has proposed solutions which can publish software or applications ina manner of virtual images, i.e., instantiating a pre-configured virtualimage to replace fussy human labor in manual installation andconfiguration of a software product.

Methods for instantiating a pre-configured virtual image already existin the prior art. Although the repetitive human labor issue can beresolved to a certain extent by these methods, the difficulty beingconfronted, currently, is that virtual image configuration andinstantiation can only be performed to software products with a simpledependency, while it is impossible to perform instantiation operationwhen a virtual solution relates to multiple virtual machines andsoftware products on the multiple virtual machines further havecomplicated dependencies.

The instantiating process after deploying a virtual image is calledactivating the virtual image. In a practical application environment,activation of multiple virtual machines in a virtual solution frequentlyoccurs, and a virtual machine-level cyclic dependency can also existbetween various activation items in the multiple virtual machines.

SUMMARY OF THE INVENTION

It is urgently desirable to provide a method for activating multiplevirtual machines in a virtual solution conveniently and quickly; and itis also desirable to enable a user without expertise in softwareapplication configuration to conveniently operate.

According to one embodiment of the present invention, there is provideda method for activating virtual machines in a virtual solution. Thismethod includes: for each virtual machine, activating activation itemsin a first activation item set independently of other virtual machines;for at least one virtual machine, activating activation items in asecond activation item set in coordination with activation of activationitems of at least another virtual machine.

According to another embodiment of the present invention, there isprovided an apparatus for activating virtual machines in a virtualsolution. This apparatus includes: a first activator, for each virtualmachine, for activating activation items in a first activation item setindependently of other virtual machines; and a second activator, for atleast one virtual machine, for activating activation items in a secondactivation item set in coordination with activation of activation itemsof at least another virtual machine.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 schematically illustrates a system block diagram forinstantiating a virtual solution;

FIGS. 2A to 2C schematically illustrate a diagram of dependenciesbetween multiple activation items of each virtual machine in a virtualsolution;

FIG. 3 schematically illustrates a flow chart of a method for activatingvirtual machines in a virtual solution according to one embodiment ofthe present invention;

FIG. 4 schematically illustrates a flow chart of a method for activatingvirtual machines in a virtual solution according to another embodimentof the present invention;

FIG. 5 schematically illustrates a flow chart of a method for activatingvirtual machines in a virtual solution according to a further embodimentof the present invention;

FIG. 6 schematically illustrates a flow chart of a method for activatingactivation items of a virtual machine coordinately according to anotherembodiment of the present invention;

FIG. 7 schematically illustrates a flow chart of a method for activatingactivation items of a virtual machine in a dummy manner according toanother embodiment of the present invention;

FIG. 8 schematically illustrates a flow chart of a method for activatingactivation items of a virtual machine in an autonomous manner accordingto another embodiment of the present invention; and

FIG. 9 schematically illustrates a diagram of an apparatus foractivating virtual machines in a virtual solution according to oneembodiment of the present invention.

DETAILED DESCRIPTION OF EMBODIMENTS

The flowcharts and block in the figures illustrate the system, methods,as well as architecture, functions and operations executable by acomputer program product according to the embodiments of the presentinvention. In this regard, each block in the flowcharts or block canrepresent a module, a program segment, or a part of code, which containsone or more executable instructions for performing specified logicfunctions. In some alternative implementations, functions indicated inblocks can occur in an order differing from the order as illustrated inthe figures. For example, two blocks illustrated consecutively can beperformed in parallel substantially or in an inverse order. This dependson relevant functions. Additionally, each block in the block diagramsand/or flowcharts and a combination of blocks in the block diagramsand/or flowcharts can be implemented by a dedicated hardware-basedsystem for performing specified functions or operations or by acombination of dedicated hardware and computer instructions.

In one embodiment, to activate various virtual machines in a virtualsolution, first, for each virtual machine, activation items in a firstactivation item set are activated independently of other virtualmachines; second, for at least one virtual machine, activation items ina second activation item set are activated in coordination withactivation of activation items of at least another virtual machine.

In one embodiment, there is provided an apparatus for activating virtualmachines in a virtual solution. The apparatus includes a first activatorand a second activator. In this apparatus, the first activator is foractivating, for each virtual machine, activation items in a firstactivation item set independently of other virtual machines; while thesecond activator is for activating, for at least one virtual machine,activation items in a second activation item set in coordination withactivation of activation items of at least another virtual machine. Byusing these embodiments, both various activation items having externaldependencies (or “across” dependencies) relationships between differentvirtual machines in a virtual solution, and various activation itemshaving cyclic dependency relationships among different virtual machinesin a virtual solution, can be activated conveniently and quickly.

According to another embodiment of the present invention, the activationis performed based on activation script of activation items to beactivated.

The method according to another embodiment of the present inventionfurther includes: generating a first activation item set for eachvirtual machine by analyzing dependency relationships between activationitems describing various virtual machines in the virtual solution.

Now, operation of one embodiment of the present invention can bedescribed in detail with reference to FIG. 1. FIG. 1 schematicallyillustrates a system block diagram 100 for instantiating a virtualsolution. As illustrated in FIG. 1, dash-line blocks 110 and 120′illustrate block diagrams before, during, and after instantiating thevirtual machine, respectively. As illustrated in the dash-line block110, the virtual solution can be stored in a virtual image library inthe form of at least one virtual image before being instantiated. Thevirtual image library here can assume various storage manners. Forexample, the virtual image library can be stored in a computer storagemedium including electrical, magnetic, optical, electromagnetic,infrared, or semi-conductor system (or apparatus or device) orpropagation medium.

Before instantiation, a virtual image is data stored in a computerstorage medium, which cannot perform various designed functions; andonly after the virtual machine is deployed to a specific physicalmachine through an instantiation process, a pre-designed function can beperformed with resources of the physical machine such as CPU.

Referring back to FIG. 1, the dash-line block 110 illustrates a virtualsolution I 120 and a virtual solution II 130, respectively, wherein thetwo virtual solutions are stored in a virtual image library 110. Eachvirtual solution can also include different amounts of virtual images.For example, the virtual solution I 120 can include virtual image I 121to virtual image N1 122, with N1 virtual images in total; while virtualsolution II 130 can include virtual image I 131 to virtual image N2 132,with N2 virtual images in total. FIG. 1 only schematically illustrates ascenario of two virtual solutions being included in the virtual imagelibrary 110. According to embodiments of the present invention, thevirtual image library 110 can comprise any arbitrary amount of virtualsolutions.

At the lower portion of FIG. 1 is illustrated a virtual solution 120′after instantiating the virtual solution I 120. After the virtualsolution I 120, as stored in the virtual image library 110, is subjectedto the instantiation process, the virtual images therein are combinedwith physical machine I 140 to physical machine M 150, respectively,with virtual machines formed on respective physical machines. Forexample, virtual machine I 141 to virtual machine R1 142 are formed onthe physical machine I 140, and virtual machine I 151 to virtual machineR2 152 are formed on the physical machine M 150.

The quantitative relationship among the virtual images and virtualsolutions and the quantitative relationship among the virtual machinesand physical machines as illustrated in FIG. 1 are merely illustrative.For example, the virtual image library 110 can comprise M amount ofvirtual solutions, while each virtual solution can comprise anyarbitrary amount of virtual images, respectively. Additionally, aftervirtual images in a same virtual solution are subjected to aninstantiation process, they can be located on at least one physicalmachine. In other words, the relationships between virtual solutions andphysical machines are not limited to a one-to-one correspondencerelationship.

FIG. 1 further illustrates a schematic diagram of various activationitems in the virtual machine M 150. Each virtual machine can include atleast one activation item. For example, the virtual machine I 151 caninclude two activation items, i.e., ConfigWAS 151-4 and ConfigNET 151-3,respectively, while HalDaemon 151-2 is a system service, and theactivation item ConfigNET 151-3 is activated only when the systemservice is started first.

For the sake of depiction, terms involved in this description will beexplained first.

Activating refers to a process of instantiating a virtual solution. Avirtual solution, before being activated, can be data storage containingat least one virtual image, while after being activated, it can be atleast one virtual machine running on at least one physical machine. Forexample, as illustrated in FIG. 1, the virtual solution I 120, afterbeing activated, can be multiple virtual machines running on physicalmachine I 140 to physical machine M 150.

Activation Item refers to a pre-customized software assembly forstarting an application, software or system. An activation item can havevarious pre-designed functions. For example, the WebSphere ApplicationServer (WAS) for configuring IBM Corporation can be regarded as anactivation item that functions as a basis for the IBM WebSphere softwareplatform and a key component of a service-oriented systematic structure.Another example for an activation item is for configuring IBM TivoliMonitor (abbreviated as ITM), or for configuring IBM DB2 database, andfor configuring ConfigNET connection assembly, etc.

Dependency relationship refers to a relationship between activationitems of a virtual machine. If activation of activation item 1 must beconditioned with activation of activation item 2, then it is calledactivation item 1 being dependent on activation item 2. This dependencycan be either a direct dependency or an indirect dependency.

A plurality of dependency relationships can exist between variousactivation items of a virtual machine. Hereinafter, variousrelationships between activation items can be described in detail withreference to FIGS. 2A to 2C. With reference to FIG. 2A, it illustratesan internal dependency relationship between various activation items ina single virtual machine. As illustrated in the virtual machine I 210 atthe left side of FIG. 2A, it includes a service HalDaemon 212 and twoactivation items, i.e., ConfigNET 213 and ConfigWAS 214. From the arrowsin the figure, it is seen that various activation items have dependencyrelationships therebetween: ConfigNET 213 is dependent on starting theservice HalDaemon 212 (this direct connection relationship between theConfigNET 213 and the service HalDaemon 212 is called directdependency), while the ConfigWAS 214 is further dependent on theConfigNET 213. Accordingly, the ConfigWAS 214 is indirectly dependent onstarting the service HalDaemon 212, and this relationship is calledindirect dependency. Therefore, in order to activate all activationitems in the activation virtual machine I 210, the activation sequenceshould be stating service halDaemon 212, ConfigNET 213, and ConfigWAS214.

FIG. 2B illustrates a dependency relationship between the virtualmachine I 210 and virtual machine II 220. Such dependency relationshipbetween activation items of two virtual machines is called an externaldependency, or “across VMs” dependency relationship. For example, in theexample as illustrated in FIG. 2B, activation of the ConfigWAS 214 canonly be executed after completing the activation of the ConfigDB2 224.

FIG. 2C illustrates that two external dependency relationships existbetween the virtual machine I 210 and the virtual machine II 220. TheConfigITM 225 in the virtual machine II 220 is dependent on theConfigWAS 214 in the virtual machine I 210, while the ConfigWAS 214 inthe virtual machine I 210 is further dependent on the ConfigDB2 224 inthe virtual machine II 220. Accordingly, although an explicitunidirectional dependency relationship exists between activation items,at a virtual machine level, the virtual machine I 210 and the virtualmachine II 220 are mutually dependent, and this dependency relationshipis called cyclic dependency.

Various kinds of dependency relationships as indicated above existbetween Activation items in a virtual solution, but the prior art failsto propose activation methods for resolving the three dependencyrelationships as illustrated in FIGS. 2A to 2C. Local activation anddistributed activation in the prior art are only suitable for the twoscenarios as illustrated in FIGS. 2A and 2B, but no activation solutioncapable of processing a cyclic dependency has been developed yet.

In the local activation, an activation engine sets an activationsequence of various activation items based on an internal dependencyrelationship between activation items in a single virtual machine. Atthis point, no external dependency relationship across multiple virtualmachines exists, and therefore, it is not required to communicate amongmultiple virtual machines. Local activation can only process thecircumstance in which no external dependency relationship exists betweenvarious activation items of the virtual machine. However, in a practicalapplication, complicated external dependency relationships across VMsalways exist between activation items of virtual machines in a virtualsolution, thus the practicality of the local activation method at thispoint will be greatly restricted.

Distributed activation can process an external dependency relationshipas indicated in FIG. 2B, which activates each virtual machine one by onein a distributed manner and finally implements total instantiation ofthe virtual solution. In this embodiment, the activation engine willfirst activate a virtual machine where a depended activation item islocated (which is virtual machine II 220 in the example of FIG. 2) basedon an external dependency relationship between the activation items; andthen the virtual machine I 210 on which the activation item ConfigWAS214 locates is activated, wherein the activation item ConfigDB2 224 inthe virtual machine II 220 is dependent on the activation item ConfigWAS214. By leveraging the distributed manner, a sequence of activatingvarious virtual machines can be determined through analyzing externaldependency relationships between various activation items in the virtualmachine; and then activation of the activation items in all virtualmachines can be implemented in a correct sequence. However, thisactivation is in coarse granularity. In other words, it can only takethe entire virtual machines as an activation unit, but cannotparticularly set an activation sequence for an activation item in thevirtual machine.

Although the distributed activation can process an external dependencyrelationship between activation items, in the case of cyclic dependency,it can be impossible to implement activation of all virtual machines ina virtual solution through overall activation of a series of virtualmachines in sequence. An actual implementation environment alwaysinvolves the scenario of cyclic dependency. Therefore, it is necessaryto provide a method for activating coordinately virtual machines in avirtual solution, and this method is expected to coordinately activatemultiple activation items in a virtual machine.

FIG. 3 schematically illustrates a flow chart 300 of a method foractivating virtual machines in a virtual solution according to oneembodiment of the present invention. At step S302, for each virtualmachine, activation items in a first activation item set are activatedindependently of other virtual machines. According to one embodiment ofthe present invention, activation items on each virtual machine in avirtual solution can be divided into two types: activation items whichcan be activated independently of other virtual machines, and activationitems which have to be activated in coordination with other virtualmachines. At the first step S302, only activation items of the firsttype are activated.

At step S304, for at least one virtual machine, activation items in asecond activation item set are activated in coordination with activationof activation items of at least another virtual machine. A coordinatedactivation according to the present invention can process a cyclicdependency relationship between activation items in multiple virtualmachines, thus this activation is a finer-granularity activation witheach activation item in each virtual machine as an activation unit.

According to one embodiment of the present invention, a plurality ofmanners can be employed to activate activation items in a firstactivation item set independently of virtual machines. For example, amanner of registering an activation item as a service can be employed. Atechnical engineer can intend to register a minimum activation item setwhich is initially activated as a service based on his/her ownexperience or dependency relationships between activation items. Then,activation items registered as service will be automatically activatedwhen the system starts, without performing dedicated activation by anactivation engine on a virtual machine. Additionally, activation itemsin the first activation item set can also be activated through theactivation engine in each virtual machine or through other apparatus.Although the activation manners are different, when activatingactivation items in the first activation item set independently of othervirtual machines, they share a same goal of creating a networkconnection for a next step of coordinated activation.

FIG. 4 schematically illustrates a flow chart 400 of a method foractivating virtual machines in a virtual solution according to a furtherembodiment of the present invention. In this embodiment, a coordinatedactivation for virtual machines in a virtual solution is performed basedon activation script of activation items to be activated. As illustratedin FIG. 4, activation script 410 is provided as configurationinformation for activating various activation items. Steps S402 and S404in FIG. 4 are similar to steps S302 and S304 as depicted in FIG. 3. Atstep S402, for each virtual machine, activation items in a firstactivation item set are activated with the activation script 410independently of other virtual machines. Then, at step S404, for atleast one virtual machine, activation items in a second activation itemset are activated with the activation script 410 in coordination withactivation of activation items of at least another virtual machine.

The “activation script” here is only a schematic activation manner, andembodiments of the present invention are not limited to programscompiled with a script language for activating activation items, but canfurther comprise, without limitation, activation programs compiled witha script language (for example, shell, python, etc.) or any otherprogramming language (for example, Java, etc.), as long as theactivation programs can attain a goal of activating the activation itemsin the virtual machine. Hereinafter, a process of implementingactivation will be depicted with “activation script” as an example of“activation program.”

According to one embodiment of the present invention, an activationscript saves configuration information required for setting eachactivation item, for example, user information of a software assemblycorresponding to an activation item, system variant information, andother parameters required to set. For example, when activating thevirtual machine I 210 and virtual machine II 220 as illustrated in FIG.2B, the activation script can be presented as in Table 1:

TABLE 1 Example of Activation Script Activation Item Activation No.Virtual Machine or Service Parameters 1 Virtual machine I HalDaemon . .. 2 Virtual machine I ConfigNET . . . 3 Virtual machine I ConfigWAS . .. 4 Virtual machine II HalDaemon . . . 5 Virtual machine II ConfigNET .. . 6 Virtual machine II ConfigDB2 . . .

Table 1 only illustrates a schematic example of an activation script.The embodiments of the present invention can store activation scriptdata with any pre-defined data structure according to system design, aslong as the data structure saves complete parameter configurations foractivating various activation items in a virtual solution. A dedicatedactivation script editor can also be designed for providing conveniencefor adding, deleting, or modifying parameter configurations foractivation items in the activation script. According to one embodimentof the present invention, an activation script can also be saved in anactivation engine of each virtual machine, and in this case, onlyactivation parameters correlated to activating the activation items inthis virtual machine are required.

FIG. 5 schematically illustrates a flow chart 500 of a method foractivating virtual machines in a virtual solution according to a furtherembodiment of the present invention. According to one embodiment of thepresent invention, a first activation item set and a second activationitem set can be determined based on metadata. As indicated at step S502,the first activation item set is generated for each virtual machine byanalyzing dependency relationships between activation items describingvarious virtual machines in a virtual solution.

Dependency relationships between activation items of various virtualmachines can be obtained based on metadata 510. Metadata 510 are datathat describe activation items in a virtual machine and dependencyrelationships between various activation items. In the case of existenceof an external dependency relation in a virtual solution as illustratedin FIG. 2, for example, an XML language can be used for description, andmetadata of the virtual machine I and the virtual machine II arepresented in Table 2 and Table 3, respectively:

TABLE 2 Metadata for Virtual Machine I 210 in FIG. 2B <?xmlversion=“1.0” encoding=“UTF-8”?> <al2:Activationxmlns:al2=“http://www.ibm.com/xmlns/ovf/activation/ al/2”> <VirtualSystem id=“HypervisorEdition”>   <Info>Activate thisbeast</Info>   <ProductActivation class=“ConfigNET”>    <Programhref=“AS/ConfigNET.sh”/>    <Service name=“activation.ConfigNET”>    <RunLevel value=“2”/>    </Service>    <OSServiceDependencyserviceName=“haldaemon”/>   </ProductActivation>   <ProductActivationclass=“ConfigWAS”>    <Program href=“AS/ConfigWAS.sh”/>   <ProductDependency class=“vm2.ConfigDB2”/>   </ProductActivation> </VirtualSystem> </al2:Activation>

TABLE 3 Metadata for Virtual Machine II 220 in FIG. 2B <?xmlversion=“1.0” encoding=“UTF-8”?> <al2:Activationxmlns:al2=“http://www.ibm.com/xmlns/ovf/activation/ al/2”> <VirtualSystem id=“HypervisorEdition”>   <Info>Activate thisbeast</Info>   <ProductActivation class=“ConfigNET”>    <Programhref=“AS/ConfigNET.sh”/>    <Service name=“activation.ConfigNET”>    <RunLevel value=“2”/>    </Service>    <OSServiceDependencyserviceName=“haldaemon”/>   </ProductActivation>   <ProductActivationclass=“ConfigDB2”>    <Program href=“AS/ConfigDB2.sh”/>  </ProductActivation>  </VirtualSystem> </al2:Activation>

AL language is only an example for illustrative purpose, and in theembodiments of the present invention, metadata in any format can becustomized, as long as they can describe activation items of eachvirtual machine and dependency relationships between the activationitems. In an example for the virtual solution as illustrated in FIG. 2B,it is seen from analyzing the metadata in Table 2 that the ConfigNET 213in the virtual machine I 210 is dependent on the service HalDaemon 212,while ConfigWAS 214 is further dependent on ConfigDB2 224 in anothervirtual machine II 220.

It can be seen from analyzing the metadata in Table 3 that activationitem 223 of the virtual machine II 220 is dependent on service HalDaemon212, while ConfigDB2 224 is not externally dependent on activation itemsof other virtual machines. When generating a first activation item, foreach virtual machine, the service HalDaemon and activation itemConfigNET can be added into the first activation item set. Next, at stepS504, service HalDaemon in each virtual machine can be first startedindependently of activation items in other virtual machines, with theConfigNET being activated; while at step S506, for at least one virtualmachine, activation items in the second activation item set areactivated in coordination with activation of activation items of atleast another virtual machine.

According to one embodiment of the present invention, activation itemsthat are outside of the first activation item set can be added into thesecond activation item set. For example, in the example as depictedabove with reference to FIG. 2B, the second activation item set of thevirtual machine I 210 can comprise ConfigWAS 214, while the secondactivation item set of the virtual machine II 220 can comprise ConfigDB2224.

According to one embodiment of the present invention, whether a networkconnection is required when activating an activation item in a virtualmachine can be used as a criterion for determining whether thisactivation item can be activated independently of other virtualmachines. A design principle for this method lies in that to activate anactivation item having an external dependency relationship must bedependent on a network connection, while how to establish the networkconnection as early as possible is fundamental to execute subsequentactivating operation.

For each virtual machine, activation items, on which a configuringnetwork connection is dependent (including direct dependency andindirect dependency), are added into a first activation item set. Atthis point, activation items in the first activation item set are allfundamental for configuring a network connection. The first activationitem set can be built in this manner so as to find a minimum activationitem set on which establishing the network connection is dependent. Forother activation items, they can be activated after the networkconnection is established. To activate in this way can guarantee thatthe first activation item set has minimal activation items, and networkconnection can be established only by activating the activation items inthis first activation item set, so as to create conditions forsubsequent coordinated activation.

According to one embodiment of the present invention, a first activationitem can also comprise an activation item that is independent fromestablishing a network connection and has no external dependencyrelationships, i.e., an activation item that needs no coordinationacross virtual machines. An activation item needing no coordinationacross virtual machines, for example, can comprise an activation itemhaving no internal dependency relationships with other activation itemsin the present virtual machine, and can further comprise an activationitem only having internal dependency relationships with other activationitems in the present virtual machine. Activation of a virtual machinecan consider comprehensively the relationship between a first activationitem set and a second activation item set, and add activation itemsneeding no coordination across virtual machines into the firstactivation item set or the second activation item set as required. Forthe purpose of establishing a network connection in a quickest way, thefirst activation item set can include minimal amount of activation itemscorrelated to establishment of the network connection, but it does notexclude further comprising other activation items.

According to one embodiment of the present invention, when activatingthe activation items in the first activation item set and the secondactivation item set, various activation items in each virtual machinecan be activated sequentially in series, or activated simultaneously inparallel. For example, if the first activation item set comprises twoactivation items having no dependency relationship there between, thetwo activation items can be simultaneously activated in parallel.

For each virtual machine, after activation items in the first activationitem set have been activated, a network connection has been successfullyestablished among various virtual machines in the virtual solution, andthen activation can be performed coordinately based on dependencyrelationships between activation items in respective virtual machines.

According to one embodiment of the present invention, activatingactivation items in the second activation item set includes: for eachvirtual machine, activating, based on the dependency relationships,activation items directly dependent on the activation items in the firstactivation item set and other activation items one by one till allactivation items in the second activation item set are activated.Hereinafter, a method for activating activation items in the secondactivation item set will be described in detail with reference to FIG.6.

FIG. 6 schematically illustrates a flow chart 600 of a method forcoordinately activating activation items of a virtual machine accordingto another embodiment of the present invention. During a coordinatedactivation process, a coordinator is set to manage scheduling workcorrelated to the coordinated activation of activation items in variousvirtual machines.

An activation engine can be set in each virtual machine, for managingactivation issues in respective virtual machines and communicating withthe outside. In the schematic flow chart of FIG. 6, the left sideillustrates an operation at the coordinator side, while the right sideillustrates an operation at the virtual machine side. Although the rightside merely illustrates an operation flow of one virtual machine, themethod is not limited to one virtual machine, but can relate to anyamount of multiple virtual machines.

The left side of FIG. 6 illustrates a schematic flow for the coordinatorto coordinately activate activation items in multiple virtual machines.At step S602, metadata are analyzed and dependency relationships betweenvarious activation items are determined according to the methodsmentioned above. In the virtual machine side as illustrated in the rightside of FIG. 6, at step S612, an activation engine in a virtual machineactivates activation items in the first activation item set, and at stepS614, a report of having completed activation of the activation items inthe first activation item set is sent to the coordinator side.

As illustrated in the left side of FIG. 6, at step S604, the coordinatorwill wait for the report of having completed activation of activationitems in the first activation item set from each virtual machine. Whenthe coordinator receives the report from a virtual machine, it indicatesthat this virtual machine has completed the configurations ofestablishing a network connection. After receiving reports from allvirtual machines, it indicates that all virtual machines in the virtualsolution have successfully established network connection, and then acoordinated activation operation among all virtual machines in thevirtual solution can be performed in the next step.

According to one embodiment of the present invention, when thecoordinator has received reports from a part of virtual machines, acoordinated activation can also be executed among this part of virtualmachines which have established network connection. And when thecoordinator receives reports from other virtual machines, these othervirtual machines are just added. The following situation can exist: ifactivation items in a virtual machine have no external dependencyrelationships, then whether the coordinator has received a report fromthe virtual machine at this point will not substantively affect thesubsequent coordinated activation operation; and if a virtual machinehas not completed activation of the first activation item set yet, whileactivation items in the second activation item set of a virtual machinewhich has established network connection are dependent on the activationitems in the virtual machine which has not completed activation yet,then the coordinator needs to wait for the report from the virtualmachine which has not completed activation yet so as to performsubsequent operation.

In other words, in one embodiment, it is unnecessary for the coordinatorto wait for reception of reports from all virtual machines in thevirtual solution before performing the coordinated activation within thescope of all virtual machines, but the coordinator can first perform thecoordinated operation only among a part of virtual machines which haveestablished network connection.

According to one embodiment of the present invention, more flexibilityis further provided. For example, it is allowed to add, through editingmetadata, a new virtual machine into a virtual solution, a newactivation item into a virtual machine, or a new dependencyrelationship. When a new virtual machine is added into a virtualsolution, steps S602 to S604 and steps S612 and s614 as illustrated inFIG. 6 are performed on the coordinator and the newly added virtualmachine, respectively.

Steps S606 and S616 in the dash-line block of FIG. 6 illustrate acoordination process between the coordinator and each virtual machinehaving sent the activation report. Namely, at step S606, for eachvirtual machine, the coordinator instructs to activate all activationitems in the second activation item set one by one based on dependencyrelationships, while at the virtual machine side, at step S616, thevirtual machine activates all activation items in the second activationitem set one by one based on instructions from the coordinator.

According to one embodiment of the present invention, a coordinator canhave metadata that describe activation items of all virtual machines ina virtual solution and their dependency relationships.

Continuing for the virtual solution as illustrated in FIG. 2, Table 4schematically illustrates an example of metadata at the coordinatorside.

TABLE 4 <?xml version=“1.0” encoding=“UTF-8”?> <al2:Activationxmlns:al2=“http://www.ibm.com/xmlns/ovf/activation/al/2”> <VirtualSystem id=“HypervisorEdition”>   <Info>Activate thisbeast</Info>   <ProductActivation class=“ConfigNET”>     <Programhref=“AS/ConfigNET.sh”/>     <Service name=“activation.ConfigNET”>     <RunLevel value=“2”/>     </Service>     <OSServiceDependencyserviceName=“haldaemon”/>   </ProductActivation>   <ProductActivationclass=“ConfigDB2”>     <Program href=“AS/ConfigDB2.sh”/>  </ProductActivation>  </VirtualSystem>  <VirtualSystemid=“HypervisorEdition”>    <Info>Activate this beast</Info>   <ProductActivation class=“ConfigNET”>      <Programhref=“AS/ConfigNET.sh”/>      <Service name=“activation.ConfigNET”>      <RunLevel value=“2”/>      </Service>      <OSServiceDependencyserviceName=“haldaemon”/>    </ProductActivation>    <ProductActivationclass=“ConfigWAS”>      <Program href=“AS/ConfigWAS.sh”/>     <ProductDependency class=“vm2.ConfigDB2”/>    </ProductActivation> </VirtualSystem> </al2:Activation>

The coordinator can be located at different positions. For example, thecoordinator can be located inside a virtual machine or at other positionoutside the virtual machine. When the coordinator is located inside avirtual machine, each virtual machine in a virtual solution can have acoordinator therein, while one virtual machine is voted out by variousvirtual machines in a particular manner and the coordinator therein isset to “on,” and the coordinators in other virtual machines are set toan “off” state. At this point, although each virtual machine has a codeof the coordinator, only the code in one virtual machine is in a workingstate.

When the coordinator is located outside the virtual machine, thecoordinator can be set on a physical device which is identical to ordifferent from the physical machine where the virtual machine islocated, or set on a physical device identical to or different from thephysical machine where a virtual image library is located, as long asthe coordinator, when working, can correctly establish networkconnection with various virtual machines and can correctly performcoordinate operation.

According to one embodiment of the present invention, for each virtualmachine, an activation sequence of various activation items in thesecond activation item set in the overall activation sequence can bedetermined; activation messages are sent to corresponding virtualmachines based on the activation sequence, and results of activation ofactivation items, corresponding to the activation messages, arereceived. Hereinafter, it will be described in detail with reference toFIG. 7.

FIG. 7 schematically illustrates a flow chart 700 of a method foractivating activation items of a virtual machine in a dummy manneraccording to another embodiment of the present invention. The flow chartof FIG. 7 is details of the coordinated activation operation in thedash-line block section of the flow chart of FIG. 6, wherein the startpoint A and the end point B in the left flow chart of FIG. 7 correspondto point A and point B in the dash-line block of FIG. 6, respectively,while the start point C and end point D in the right flow chart of FIG.7 correspond to point C and point D in the dash-line block of FIG. 6.Marks A, B, C, and D in the flow chart of FIG. 8 have the same meaning,which will not be detailed here.

In the dummy manner, a coordinator uniformly executes central control,i.e., determining, based on metadata in the coordinator (for example, asillustrated in Table 4), execution sequence for various activation itemsin the second activation item set in each virtual machine, and sendingan activation command to corresponding virtual machines based on theexecution sequence; and reporting completion of activation to thecoordinator after a virtual machine activates a relevant activation itembased on a message from the coordinator. At this point, the coordinatorfurther sends a command for activating a next activation item based onthe execution sequence till activation of the entire virtual solution iscompleted.

As illustrated at the left side of FIG. 7, at step S702, the coordinatordetermines a sequence of various activation items in the secondactivation item set in each virtual machine in an overall activationsequence. For example, for the example as illustrated in FIG. 2C, thecoordinator can determine through metadata analysis the secondactivation item sets of the virtual machine I and virtual machine II tobe:

The second activation item of the virtual machine I: {ConfigWAS};

The second activation item of the virtual machine II: {ConfigDB2,ConfigITM}.

In this example, ConfigWAS is dependent on ConfigDB2, while ConfigITM isdependent on ConfigWAS; therefore, it is seen that the overallactivation sequence should be ConfigDB2->ConfigWAS->ConfigITM.Therefore, the coordinator can send an activation command tocorresponding virtual machines one by one according to this sequence.

At step S704, a virtual machine searches for a next activation item(“ConfigDB2” in the above example) and sends the activation command tothe virtual machine II associated with the “ConfigDB2.” As illustratedin the right side of FIG. 7, at step S712, the virtual machine waits forthe activation command. When receiving the activation command from thecoordinator, at step S714, whether the command is an end command isdetermined; if not, the flow proceeds to step S716, while if yes, itindicates that all activation items in the second activation item set ofthis virtual machine have been activated. For example, the virtualmachine II activates the activation item “ConfigDB2” at step S716, andreports the completion of activation to the coordinator S718, and thencontinues to wait for the activation command.

As illustrated at the left side of FIG. 7, the coordinator waits for anactivation result at step S706; when receiving an activation result,whether activation of the entire virtual solution has been completed isdetermined at step S708; if not completed yet, then the flow returns tostep S704 to search a next activation item and repeat the aboveoperations; if already completed, it indicates that activation of theentire virtual solution has been completed. In the above activationsequence “ConfigDB2->ConfigWAS->ConfigITM,” the next activation item is“ConfigWAS,” then the coordinator sends the activation command to thevirtual machine I associated with the activation item ConfigWAS andcyclically performs the above operation till all activation items in theactivation sequence are activated sequentially.

In the dummy manner, a virtual machine does not need to analyzedependency relationships between activation items, but just waits for anactivation command from a coordinator and then activates correspondingactivation items and reports activation results to the coordinator;while the coordinator performs analysis on the dependency relationshipsand determines coordinate operations with an activation sequence.

According to one embodiment of the present invention, when an activationitem on which an activation item that has not been activated isdependent is activated, the coordinator can send a notice on stateupdate, and receive a result regarding the activation item dependent onthe state update being activated. This process will be described indetail with reference to FIG. 8.

FIG. 8 schematically illustrates a flow chart 800 of a method foractivating activation items of a virtual machine in an autonomous manneraccording to another embodiment of the present invention. In theautonomous manner, a coordinator informs each virtual machine of a stateof an activation item on which an activation item in the virtual machineis dependent; while an activation engine in each virtual machinedetermines which activation items can be activated and which activationitems cannot be activated based on the state, and reports an activationresult to the coordinator after activating those activation items whichcan be activated; and the coordinator updates states of variousactivation items, and notifies a corresponding virtual machine based ona new activation state, till the completion of activation of the entirevirtual solution.

In one embodiment, it is necessary to maintain the following informationat the coordinator side and the virtual machine sides, respectively: astate list of various activation items in virtual machines, anddependency relationships between various activation items. At thecoordinator side, the state list maintains states of activation items inthe second activation item set in all virtual machines in the virtualsolution, as well as dependency relationships between the activationitems in the second activation item set in all virtual machines in thevirtual solution, while it is only required to maintain the state listof the activation items in the second activation item set in the virtualmachine itself, as well as the dependency relationships between variousactivation items at a virtual machine side. Upon initiation, the statesfor respective activation items in the state lists at the coordinatorside and respective virtual machine sides are all “Not Activated” (i.e.,having not been activated). At a virtual machine side, when the virtualmachine activates an activation item that can be activated, the state ofthe activation item is set to “activated,” while at the coordinatorside, the coordinator sets the state of the corresponding activationitem as “activated” in response to reception of an activation resultfrom the virtual machine.

As illustrated at the left side of FIG. 8, at step S802, the coordinatorsends an activation item state associated with the virtual machine. Asillustrated at the right side of FIG. 8, at step S812, the virtualmachine first initializes an activation item state list and dependencyrelationships, and at step S814, it can update the state list of itselfwith the activation item state from the coordinator. In one embodiment,a virtual machine itself can not generate a dependency relationship or astate list, but receives the dependency relationship and state list fromthe coordinator; or a virtual machine can generate a dependencyrelationship and a state list by itself, therefore it is unnecessary toreceive the dependency relationship and state list sent from thecoordinator upon initialization; or various virtual machines cangenerate their respective state list and dependency relationship bythemselves and send them to the coordinator, while the coordinatorgenerates a state list and a dependency relationship at the coordinatorside through summarizing the respective state lists and dependencyrelationships.

As illustrated at the right side of FIG. 8, at step S816, the virtualmachine searches for an activation item that can be currently activatedand executes activation, and after activation, at step S818, it reportsthe activation result to the coordinator. The coordinator waits for theactivation result at step S804, and updates the recently activatedactivation item state at step S806, and informs relevant virtualmachines of states of which activation items have been changed at stepS808. At step S810, if activation of an entire virtual solution has notbeen completed yet, then the flow returns to step S804; and if it hasbeen completed, then the process at the coordinator side ends.

At step S814, the virtual machine updates the state list of theactivation items in the present virtual machine in response to receptionof a notification of state change, and searches for an activation itemthat can be currently activated at step S816. Its operation manner iscompletely identical to what is previously mentioned, till activation ofthe entire virtual machines has been completed, which will not bedetailed here.

Now, the operation flow of FIG. 8 will be explained in detail with thevirtual solution in FIG. 2C as an example.

As mentioned above:

The second activation item of the virtual machine I: {ConfigWAS};

The second activation item of the virtual machine II: {ConfigDB2,ConfigITM}.

In this example, ConfigWAS is dependent on ConfigDB2, while ConfigITM isdependent on ConfigWAS; therefore, it is seen that the overallactivation sequence should be ConfigDB2->ConfigWAS->ConfigITM.

At the initialization, the state lists of the virtual machine I, virtualmachine II, and coordinator are illustrated in Table 5, Table 6, andTable 7, respectively:

TABLE 5 State List of Virtual Machine I No. Activation Item State 1ConfigWAS Not Activated

TABLE 6 State List of Virtual Machine II No. Activation Item State 1ConfigDB2 Not Activated 2 ConfigITM Not Activated

TABLE 7 State List of the Coordinator No. Virtual Machine ActivationItem State 1 Virtual machine ConfigWAS Not Activated I 2 Virtual machineConfigDB2 Not Activated II 3 Virtual machine ConfigITM Not Activated II

At this point, each virtual machine searches for an activation item,which can be currently activated, based on a dependency relationship.The virtual machine I finds that the activation item ConfigWAS isexternally dependent on ConfigDB2, and thus has to wait for thecoordinator to notify that the ConfigDB2 has been activated beforeactivating the ConfigWAS. The virtual machine II finds that theactivation condition for ConfigDB2 has been mature, and then activatesthe ConfigDB2 and updates the state list as illustrated in Table 6(i.e., modifying the state of the ConfigDB2 to “activated”), and reportsthe coordinator thereafter that the ConfigDB2 in the virtual machine IIhas been activated. The coordinator modifies its own state list (i.e.,modifying the state of the ConfigDB2 in the virtual machine II to“activated”) in response to reception of the result that the ConfigDB2in virtual machine II has been activated.

At this point, the virtual machine I updates its own state list inresponse to reception of the message indicating that the state of theConfigDB2 has been updated as “activated,” and knows that it canactivate the ConfigWAS based on the dependency relationship, and furtheractivates the ConfigWAS and modifies the state list, etc. Each virtualmachine and coordinator repeats execution of the above steps till theentire virtual solution is activated.

The above example only illustrates an example having a singledependency. In a practical scenario, there can be a situation in whichone activation item (for example, A) is dependent on a plurality ofactivation items (B1, B2, . . . , Bn) simultaneously, and at this point,the activation item A can only be activated after the plurality ofactivation items B1, B2, . . . , and Bn have been activated.

Although the above example illustrates a scenario that ConfigDB2,ConfigWAS, and ConfigITM are activated one by one in sequence, when aplurality of virtual machines have at least one activation item that canbe activated, respectively, their respective at least one activationitem can be activated simultaneously in the plurality of virtualmachines. Additionally, when there are a plurality of activation itemsthat can be activated in a virtual machine simultaneously, the pluralityof activation items can be activated simultaneously. In other words, atleast one activation item in at least one virtual machine can beactivated in series, in parallel, or in combination of both, and themethod according to the present invention does not limit the activationsequence of a plurality of activation items which satisfy an activationcondition. In the autonomous activation manner, the specific activationsequence is determined by respective virtual machine itself.

FIG. 9 schematically illustrates a diagram of an apparatus 900 foractivating virtual machines in a virtual solution according to oneembodiment of the present invention. As illustrated in FIG. 9, acoordinator 910 can include: a script analyzer 912, a metadata analyzer914, a first activator 916, and a second activator 918. The scriptanalyzer 912 for analyzing a read activation script, a metadata analyzer914 for analyzing read metadata and interpreting the metadata intodependency relationships between activation items in a virtual machinein the virtual solution.

The first activator 916 is for activating activation items in a firstactivation item set in each virtual machine. The first activator 916 canfurther include means for generating the first activation item set basedon the dependencies derived by the metadata analyzer 914, wherein, foreach virtual machine, the first activator 916 activates the activationitems in the first activation item set independently of other virtualmachines based on script parameters obtained from the script analyzer912.

The second activator 918 is for activating activations in a second itemset in each virtual machine. The second activator 918 can furtherinclude means for generating the second activation item set based on allactivation items of each virtual machine and the first activation itemset. The second activator 918 is for activating, for at least onevirtual machine, activation items in a second activation item set incoordination with activation of activation items of at least anothervirtual machine.

According to another embodiment of the present invention, the firstactivator and the second activator perform activation based onactivation script of activation items to be activated.

The apparatus according to another embodiment of the present inventionfurther includes a first activation set generator for generating a firstactivation item set for each virtual machine by analyzing dependencyrelationships between activation items describing various virtualmachines in the virtual solution.

By using various embodiments of the present invention, even a virtualsolution relates to multiple virtual machines and software products onthe multiple virtual machines have complicated dependencies, forexample, cyclic dependencies, various virtual machines in the virtualsolution can also be activated conveniently and quickly.

The present invention can adopt a form of hardware embodiment, softwareembodiment or one embodiment including hardware components and softwarecomponents. In a preferred embodiment, the present invention isimplemented as software, including, without limitation to, firmware,resident software, micro-code, etc.

Moreover, the present invention can be implemented as a computer programproduct usable from computers or accessible by computer-readable mediathat provide program code for use by or in connection with a computer orany instruction executing system. For the purpose of description, acomputer-usable or computer-readable medium can be any tangible meansthat can contain, store, communicate, propagate, or transport theprogram for use by or in connection with an instruction executionsystem, apparatus, or device.

The medium can be an electric, magnetic, optical, electromagnetic,infrared, or semiconductor system (apparatus or device), or propagationmedium. Examples of the computer-readable medium can include thefollowing: a semiconductor or solid storage device, a magnetic tape, aportable computer diskette, a random access memory (RAM), a read-onlymemory (ROM), a hard disk, and an optical disk. Examples of the currentoptical disk include a compact disk read-only memory (CD-ROM), compactdisk-read/write (CR-ROM), and DVD.

A data processing system suitable for storing or executing program codecan include at least one processor that is coupled to a memory elementdirectly or via a system bus. The memory element can include a localmemory usable during actually executing the program code, a mass memory,and a cache that provides temporary storage for at least one portion ofprogram code so as to decrease the number of times for retrieving codefrom the mass memory during execution.

An Input/Output or I/O device (including, without limitation to, akeyboard, a display, a pointing device, etc.) can be coupled to thesystem directly or via an intermediate I/O controller.

A network adapter can also be coupled to the system such that the dataprocessing system can be coupled to other data processing systems,remote printers or storage devices via an intermediate private or publicnetwork. A modem, a cable modem, and an Ethernet card are merelyexamples of a currently usable network adapter.

It can be understood from the foregoing description that modificationsand alterations can be made to the respective embodiments of the presentinvention without departing from the true spirit of the presentinvention. The description in the present specification is intended tobe illustrative and not limiting. The scope of the present invention islimited by the appended claims only.

1. A method for activating virtual machines in a virtual solution,comprising: activating activation items in a first activation item setindependently of other virtual machines for each virtual machine; andactivating activation items in a second activation item set incoordination with activation of activation items of at least anothervirtual machine for at least one virtual machine.
 2. The methodaccording to claim 1, wherein the activating is performed based on anactivation script of an activation item to be activated.
 3. The methodaccording to claim 1, further comprising: generating the firstactivation item set for each virtual machine by analyzing dependencyrelationships between activation items describing various virtualmachines in the virtual solution.
 4. The method according to claim 3,wherein the dependency relationships of the activation items compriseinternal dependencies between activation items within a single virtualmachine.
 5. The method according to claim 3, wherein the dependencyrelationships of the activation items comprise external dependenciesbetween activation items of multiple virtual machines.
 6. The methodaccording to claim 5, wherein the external dependencies comprise cyclicdependencies.
 7. The method according to claim 3, further comprising:adding activation items that are outside of the first activation itemset in each virtual machine, into the second activation item set.
 8. Themethod according to claim 3, wherein generating the first activationitem set for each virtual machine comprises: adding activation items onwhich a configuring network connection is dependent, into the firstactivation item set.
 9. The method according claim 3, wherein activatingactivation items in the second activation item set for each virtualmachine in the at least one virtual machine comprises: activating, oneby one, based on the dependency relationships, activation items in thesecond activation item set that are directly dependent on the activationitems in the first activation item set; and activating, one by one,activation items in the second activation item set that are indirectlydependent on activation items in the first activation item set, untilall activation items in the second activation item set have beenactivated.
 10. The method according to claim 9, wherein the activatingone by one comprises: determining an activation sequence of eachactivation item in the second activation item set in an overallactivation sequence, for each virtual machine; sending an activationmessage to a corresponding virtual machine based on the activationsequence; and receiving a result indicating that an activation itemcorresponding to the activation message is activated.
 11. The methodaccording to claim 9, wherein the activating one by one for each virtualmachine comprises: sending a notification of state update when anactivation item, on which an activation item that has not been activatedis dependent, is activated; and receiving a result indicating that anactivation item dependent on the state update is activated.
 12. Anapparatus for activating virtual machines in a virtual solution,comprising: a first activator for activating, for each virtual machine,activation items in a first activation item set independently of othervirtual machines; and a second activator for activating, for at leastone virtual machine, activation items in a second activation item set incoordination with activation of activation items of at least anothervirtual machine.
 13. The apparatus according to claim 12, wherein thefirst activator and the second activator perform activation based on anactivation script of an activation item to be activated.
 14. Theapparatus according to claim 12, wherein the first activator generatesthe first activation item set for each virtual machine by analyzingdependency relationships between activation items describing variousvirtual machines in the virtual solution.
 15. The apparatus according toclaim 14, wherein the dependency relationships of the activation itemscomprise internal dependencies between activation items within a singlevirtual machine.
 16. The apparatus according to claim 14, wherein thedependency relationships of the activation items comprise externaldependencies between activation items of multiple virtual machines. 17.The apparatus according to claim 16, wherein the external dependenciescomprise cyclic dependencies.
 18. The apparatus according to claim 14,wherein the second activator generates the second activation item set byadding activation items in each virtual machine that are outside of thefirst activation item set.
 19. The apparatus according to claim 14,wherein the first activator comprises means for adding activation itemson which a configuring network connection is dependent into the firstactivation item set.
 20. The apparatus according to claim 14, whereinthe second activator comprises: means for activating, one by one, basedon the dependency relationships, and for each machine in the at leastone virtual machine, activation items in the second activation item setthat are directly dependent on the activation items in the firstactivation item set; and means for activating, one by one, activationitems in the second activation item set that are indirectly dependent onactivation items in the first activation item set, until all activationitems in the second activation item set have been activated.
 21. Theapparatus according to claim 20, wherein the means for activatingcomprises a dummy activation means comprising: means for determining,for each virtual machine, an activation sequence of each activation itemin the second activation item set in an overall activation sequence; andmeans for sending an activation message to a corresponding virtualmachine based on the activation sequence, and receiving a resultindicating that an activation item corresponding to the activationmessage is activated.
 22. The apparatus according to claim 20, whereinthe means for activating comprises an autonomous activation meanscomprising: means for sending, for each virtual machine, a notificationof state update when an activation item on which an activation item thathas not been activated is dependent is activated; and means forreceiving a result indicating that an activation item dependent on thestate update is activated.